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Use a TypedArray in the createPostTable function

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This commit is contained in:
Jonas Jenwald 2026-04-13 15:12:38 +02:00
parent 419c2652c3
commit aa0bc24e95
1 changed files with 26 additions and 12 deletions
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38
src/core/fonts.js
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@ -340,6 +340,17 @@ function setSafeInt16(view, pos, val) {
return pos + 2;
}
function setInt32(view, pos, val) {
if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
assert(
typeof val === "number" && Math.abs(val) < 2 ** 32,
`setInt32: Unexpected input "${val}".`
);
}
view.setInt32(pos, val);
return pos + 4;
}
function isTrueTypeFile(file) {
const header = file.peekBytes(4),
str = bytesToString(header);
@ -888,18 +899,21 @@ function createOS2Table(properties, charstrings, override) {
}
function createPostTable(properties) {
const angle = Math.floor(properties.italicAngle * 2 ** 16);
return (
"\x00\x03\x00\x00" + // Version number
string32(angle) + // italicAngle
"\x00\x00" + // underlinePosition
"\x00\x00" + // underlineThickness
string32(properties.fixedPitch ? 1 : 0) + // isFixedPitch
"\x00\x00\x00\x00" + // minMemType42
"\x00\x00\x00\x00" + // maxMemType42
"\x00\x00\x00\x00" + // minMemType1
"\x00\x00\x00\x00" // maxMemType1
);
const data = new Uint8Array(32),
view = new DataView(data.buffer);
let pos = 0;
pos = setArray(data, pos, [0x00, 0x03, 0x00, 0x00]); // Version number
pos = setInt32(view, pos, Math.floor(properties.italicAngle * 2 ** 16)); // italicAngle
pos += 2; // underlinePosition, skip redundant "\x00\x00"
pos += 2; // underlineThickness, skip redundant "\x00\x00"
setInt32(view, pos, properties.fixedPitch ? 1 : 0); // isFixedPitch
// minMemType42, skip redundant "\x00\x00\x00\x00"
// maxMemType42, skip redundant "\x00\x00\x00\x00"
// minMemType1, skip redundant "\x00\x00\x00\x00"
// maxMemType1, skip redundant "\x00\x00\x00\x00"
return data;
}
function createPostscriptName(name) {